I had originally posted this in the impressions forum, but after a little updating and some consideration, I decided to post it as a review as well.   After owning the closed-back EL-8s for 4 months, I finally feel confident enough to give some impressions. These represent approximately 150 hours of listening to the EL-8s, and probably about the same amount on a collection of other headphones.   First, a bit about me. In 2011, I bought some ATHM40s. In 2014, I sold them for HiFiMAN HE-400s. At the time, I was lucky enough to own a pretty decent...

Build and features Tisbury Audio is a small audio company based in England that makes (at time of writing) two products: a passive preamp and a headphone amp. Their headphone amp, the Tisbury Audio Challenge Amp 1, is an extremely simple desktop amplifier. On the back, you'll find a power switch, RCA inputs, and a port for power. On the front, there's the volume knob, an impedance switch, and a 1/4" TRS jack.     The volume pot is the Alps "Blue Velvet", which I find extremely smooth and high quality1. The headphone plug is a standard high...